commands

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Get-DbaCpuRingBuffer

Author Patrick Flynn (@sqllensman)
Availability Windows, Linux, macOS

 

Synopsis

Collects CPU data from sys.dm_os_ring_buffers. Works on SQL Server 2005 and above.

Description

This command is based off of Glen Berry's diagnostic query for average CPU

The sys.dm_os_ring_buffers stores the average CPU utilization history by the current instance of SQL Server, plus the summed average CPU utilization by all other processes on your machine are captured in one minute increments for the past 256 minutes.

Reference: https://www.sqlskills.com/blogs/glenn/sql-server-diagnostic-information-queries-detailed-day-16//

Syntax

Get-DbaCpuRingBuffer
    [-SqlInstance] <DbaInstanceParameter[]>
    [[-SqlCredential] <PSCredential>]
    [[-CollectionMinutes] <Int32>]
    [-EnableException]
    [<CommonParameters>]

 

Examples

 

Example: 1
PS C:\> Get-DbaCpuRingBuffer -SqlInstance sql2008, sqlserver2012

Gets CPU Statistics from sys.dm_os_ring_buffers for servers sql2008 and sqlserver2012 for last 60 minutes.

Example: 2
PS C:\> Get-DbaCpuRingBuffer -SqlInstance sql2008 -CollectionMinutes 240

Gets CPU Statistics from sys.dm_os_ring_buffers for server sql2008 for last 240 minutes

Example: 3
PS C:\> $output = Get-DbaCpuRingBuffer -SqlInstance sql2008 -CollectionMinutes 240 | Select-Object * | ConvertTo-DbaDataTable

Gets CPU Statistics from sys.dm_os_ring_buffers for server sql2008 for last 240 minutes into a Data Table.

Example: 4
PS C:\> 'sql2008','sql2012' | Get-DbaCpuRingBuffer

Gets CPU Statistics from sys.dm_os_ring_buffers for servers sql2008 and sqlserver2012

Example: 5
PS C:\> $cred = Get-Credential sqladmin
PS C:\> Get-DbaCpuRingBuffer -SqlInstance sql2008 -SqlCredential $cred

Connects using sqladmin credential and returns CPU Statistics from sys.dm_os_ring_buffers from sql2008

Required Parameters

-SqlInstance

Allows you to specify a comma separated list of servers to query.

Alias
Required True
Pipeline true (ByValue)
Default Value

Optional Parameters

-SqlCredential

Login to the target instance using alternative credentials. Accepts PowerShell credentials (Get-Credential). Windows Authentication, SQL Server Authentication, Active Directory - Password, and Active Directory - Integrated are all supported. For MFA support, please use Connect-DbaInstance. To use: $cred = Get-Credential, this pass this $cred to the param. Windows Authentication will be used if DestinationSqlCredential is not specified. To connect as a different Windows user, run PowerShell as that user.

Alias
Required False
Pipeline false
Default Value
-CollectionMinutes

Allows you to specify a Collection Period in Minutes. Default is 60 minutes

Alias
Required False
Pipeline false
Default Value 60
-EnableException

By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message. This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting. Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch.

Alias
Required False
Pipeline false
Default Value False

 

Want to see the source code for this command? Check out Get-DbaCpuRingBuffer on GitHub.
Want to see the Bill Of Health for this command? Check out Get-DbaCpuRingBuffer.